CN112848390A - Vacuum infusion method for wind driven generator blade - Google Patents
Vacuum infusion method for wind driven generator blade Download PDFInfo
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- CN112848390A CN112848390A CN202011585859.5A CN202011585859A CN112848390A CN 112848390 A CN112848390 A CN 112848390A CN 202011585859 A CN202011585859 A CN 202011585859A CN 112848390 A CN112848390 A CN 112848390A
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- glass fiber
- vacuum
- infusion method
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000009755 vacuum infusion Methods 0.000 title claims abstract description 25
- 239000003365 glass fiber Substances 0.000 claims abstract description 29
- 239000003292 glue Substances 0.000 claims abstract description 25
- 239000004744 fabric Substances 0.000 claims abstract description 22
- 229920005989 resin Polymers 0.000 claims abstract description 19
- 239000011347 resin Substances 0.000 claims abstract description 19
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 238000000605 extraction Methods 0.000 claims abstract description 7
- 239000012528 membrane Substances 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 11
- 239000011162 core material Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 238000001802 infusion Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000010248 power generation Methods 0.000 abstract description 4
- 230000006872 improvement Effects 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 239000011152 fibreglass Substances 0.000 description 3
- 240000007182 Ochroma pyramidale Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 241000519995 Stachys sylvatica Species 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/36—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and impregnating by casting, e.g. vacuum casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/542—Placing or positioning the reinforcement in a covering or packaging element before or during moulding, e.g. drawing in a sleeve
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
- B29L2031/082—Blades, e.g. for helicopters
- B29L2031/085—Wind turbine blades
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Wind Motors (AREA)
Abstract
The invention relates to a vacuum infusion method for a wind driven generator blade. The vacuum infusion method of the wind driven generator blade comprises the following steps: coating a release agent on the blade mould; laying glass fiber and a prefabricated girder on a blade mould in sequence; paving demoulding cloth, a porous isolating membrane and a flow guide net on the glass fiber cloth or the prefabricated girder; paving a flow guide pipe according to the shape and the gradient of the blade mould, and setting glue injection ports on the flow guide pipe section by section; covering a ventilating and glue-impermeable one-way membrane on an air extraction opening of the blade mould, and covering the air extraction opening with a sealing rubber strip; covering and sealing by using a vacuum film, and measuring the vacuum degree by connecting a vacuum meter; injecting resin and curing. Compared with the vacuum infusion method of the wind power blade in the prior art, the vacuum infusion method of the wind power generation blade can effectively avoid the phenomenon that the glass fiber is wrapped with air and dried, and can effectively control the content of the glass fiber in each area, improve the strength of the shell and reduce the weight of the blade. And meanwhile, the production cost is reduced.
Description
Technical Field
The invention belongs to the technical field of wind driven generator blade production, and particularly relates to a vacuum infusion method for a wind driven generator blade.
Background
Wind energy is a clean renewable energy source. According to the analysis of the world meteorological organization, the global total wind energy is 3 multiplied by 1017kW, wherein the available wind energy is 2 x 1010kW. Therefore, the development and utilization of wind energy resources can not only search for new alternative energy sources for the 21 st century, but also be beneficial to environmental protection.
The design and the adopted materials of the blades used in wind energy development determine the performance and the power of a wind power generation device and also determine the cost of a wind generating set, and the material strength of the blades is the key of the performance of the wind generating set. As for the material of the blade, the initial wood product is gradually changed into the glass fiber reinforced plastic along with the enlargement of the blade. The glass fiber reinforced plastic blade has been widely used as a blade material because of its advantages of high fatigue strength, low notch sensitivity, good corrosion resistance, easy molding, and capability of designing strength and rigidity according to the stress characteristics of the blade. At present, the commercial large wind turbine blades are mostly made of glass fiber reinforced plastic composite materials.
The manufacturing method of the large wind power blade mainly comprises the following five steps: (1) And laying a blade laying layer on the surface of the blade mould, namely sequentially laying a blade shell outer skin cloth layer, a root reinforcing layer, a girder prefabricated part, a core material, a blade shell inner skin and the root reinforcing layer. (2) And laying a vacuum infusion system, infusing resin, and curing to form the blade shell. The vacuum filling system comprises a vacuum filling system, a blade mould, a blade web plate prefabricated part, a blade shell and a blade mould, wherein a filling port of the vacuum filling system is arranged above a skin in the blade shell, and an air exhaust port is arranged on two sides of the blade mould; (4) Closing the upper and lower blade shells and curing to form the blade; (5) And (5) carrying out blade post-treatment. However, as the stand-alone power of wind turbines continues to increase, the length of the blades also continues to increase. The blade that length is longer leads gluey speed faster on the casing in the vacuum infusion process, and the casing structure is complicated, and each type glass fiber cloth, PVC, BALSA wood, prefabricated girder and the clearance between them make the inside resin flow velocity of casing inconsistent. The difference of the upper and lower flow rates of the epoxy resin causes the phenomena of dry fiber and air inclusion, and the production quality of the glass fiber blade is seriously reduced.
Disclosure of Invention
In order to solve the technical problem, the invention provides a vacuum infusion method for a wind driven generator blade.
The invention discloses a vacuum infusion method of a wind driven generator blade, which adopts the technical scheme that:
a vacuum infusion method for a wind driven generator blade comprises the following steps:
coating a release agent on the blade mould;
laying glass fiber and a prefabricated girder on a blade mould in sequence;
paving demoulding cloth, a porous isolating membrane and a flow guide net on the glass fiber cloth or the prefabricated girder;
paving a flow guide pipe according to the shape and the gradient of the blade mould, and setting glue injection ports on the flow guide pipe section by section;
covering a ventilating and glue-impermeable one-way membrane on an air extraction opening of the blade mould, and covering the air extraction opening with a sealing rubber strip;
covering and sealing by using a vacuum film, and measuring the vacuum degree by connecting a vacuum meter;
injecting resin and curing.
As a further improvement of the technical scheme, when the flow guide net is laid on the glass fiber cloth or the girder, the flow guide net is completely laid on the glass fiber cloth positioned at the root of the blade mould from the front edge to the rear edge, the flow guide net is not laid on the glass fiber cloth positioned in the middle of the blade mould and having the number of layers less than or equal to six, and the flow guide net is not laid on the area positioned in the middle of the blade mould and having the gradient less than or equal to 30 degrees; a flow guide net is laid in the area, located in the middle of the blade mould, with the gradient larger than 30 degrees; the lower side of the flow guide pipe is paved with a flow guide net, and the crossbeam is paved with a flow guide net.
As a further improvement to the technical proposal, the width of the flow guide net at the lower side of the flow guide pipe is 20 cm.
As a further improvement to the technical scheme, the flow guide pipe is an omega pipe.
As a further improvement to the technical scheme, in the process of injecting the resin, the resin injected into the flow guide pipe is injected into the glass fiber material through the flow guide net, and air is exhausted while the resin is injected.
As a further improvement to the technical scheme, in the injection process, a flow guide net is laid at the edge of the core material seam and the girder to balance the flow rate of the upper glue solution and the lower glue solution, so that the flow rate of the glue solution is balanced.
The invention provides a vacuum infusion method for a wind driven generator blade, which has the following beneficial effects compared with the prior art:
according to the vacuum infusion method of the wind driven generator blade, the diversion net is fully paved in the area with uniform material inside the blade mould, the diversion pipes are paved on the areas such as the edge of the crossbeam, the edge of the core material, the edge of the auxiliary beam and the like, and the glue injection sequence is controlled, so that resin flows linearly and uniformly in each area. The number of the glass fiber cloth layers in the middle area of the blade is small, the difference of the resin flow velocity is large, a flow guide net is laid above the equal flow velocity uneven area at the edge of the crossbeam and below the flow guide groove, the flow velocity of the glue solution is adjusted to ensure that the glue solution flows linearly, the glue solution is uniformly applied, and the glass fiber cloth can be well and completely soaked. Compared with the prior art, the vacuum infusion method for the wind power generation blade can effectively avoid the phenomenon that the glass fiber is wrapped with air and is dry, and meanwhile, the gel content of the glass fiber in each area can be effectively controlled, the strength of the shell is improved, and the weight of the blade is reduced. And meanwhile, the production cost is reduced.
Drawings
FIG. 1 is a flow chart of a method of vacuum infusion of a wind turbine blade of the present invention;
FIG. 2 is a schematic structural view of a blade in the vacuum infusion method of a wind turbine blade according to the present invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;
in the figure: 1. a housing; 2. a girder; 3. a flow guide pipe; 4. a flow guide net; 5. a glue injection port; 6. a VAP film.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The specific embodiment of the vacuum infusion method for the wind turbine blade of the invention, as shown in fig. 1 to 4, comprises the following steps:
1. and (4) coating a release agent which is convenient for demolding on the blade mold.
2. And laying the glass fiber, PVC, BALSA and the prefabricated girder 2 on the mould in sequence according to the blade structure.
3. According to different areas, a demoulding cloth and a perforated isolating membrane are paved above the material, and a flow guide net 4 is paved in a selective area. Wherein the selective area laying flow guide net 4 means that:
1) the fiber cloth layers of the blade root are more, the structure is single, and the flow guide net 4 is fully paved;
2) the number of fiber cloth layers in the leaves is less (less than or equal to 6 layers), the gradient of the mould of the shell 1 is smaller (less than or equal to 30 degrees), and no flow guide net 4 is laid;
3) a flow guide net 4 is laid in the area where the mould of the leaf shell 1 has a larger gradient (more than or equal to 30 degrees);
4) a flow guide net 4 with the width of 20cm is paved below the flow guide pipe 3;
5) the diversion net 4 is not laid in the gum dipping difficult area (such as an auxiliary beam UD) caused by the type of the fiber cloth in the leaves, and an air pumping bag made by matching the VAP film 6 with the vacuum film is adopted for covering and laying;
6) the crossbeam 2 is fully paved with a diversion net 4.
4. Laying a flow guide pipe 3 according to the shape and the gradient of the mould, and setting glue injection ports 5 section by section;
5. covering a VAP film 6 which is air-permeable and impermeable to glue at an air extraction opening of the mould and covering the VAP film with a sealing rubber strip;
6. covering and sealing by using a vacuum film, and measuring the vacuum degree by connecting a vacuum meter;
7. injecting resin, curing and post-treating the blade.
Further, the draft tube 3 is an omega tube.
In the step 4, a plurality of glue injection ports 5 are arranged in the length direction of the flow guide pipe 3, and the plurality of glue injection ports 5 are arranged in the length direction of the flow guide pipe 3 at even intervals, that is, the distance between two adjacent glue injection ports 5 is equal.
In step 7, during the resin injection process, the resin injected into the draft tube 3 is injected into the glass fiber material through the flow guide net 4, and air is discharged simultaneously with the resin injection. In order to facilitate the air discharge without forming white spots and dead inclusion formed by air in the glass fiber material, a flow guide net 4 is laid at the core material seams, the edges of the girder 2 and the like to balance the flow rates of upper and lower glue solutions, so that the glue solution flow rates are balanced, and the air is uniformly and completely discharged.
According to the vacuum infusion method of the wind driven generator blade, the diversion net 4 is fully paved in the area with uniform material inside the blade mould, the diversion pipes 3 are paved on the edge of the crossbeam 2, the edge of the core material, the edge of the auxiliary beam and other areas, and the glue injection sequence is controlled, so that resin flows linearly and uniformly in each area. The number of the glass fiber cloth layers in the middle area of the blade is small, the difference of the resin flow velocity is large, the flow guide net 4 is laid on the edge of the crossbeam 2 and above the area with the equal flow velocity and the uneven flow velocity below the flow guide groove, the flow velocity of the glue solution is adjusted to ensure that the glue solution flows linearly, the glue solution is uniformly applied, and the glass fiber cloth can be well and completely soaked. Compared with the prior art, the vacuum infusion method for the wind power generation blade can effectively avoid the phenomenon that the glass fiber is wrapped with air and dried, and can effectively control the gel content of the glass fiber in each area, improve the strength of the shell 1 and reduce the weight of the blade. And meanwhile, the production cost is reduced.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (6)
1. A vacuum infusion method for a wind driven generator blade is characterized by comprising the following steps:
coating a release agent on the blade mould;
laying glass fiber and a prefabricated girder on a blade mould in sequence;
paving demoulding cloth, a porous isolating membrane and a flow guide net on the glass fiber cloth or the prefabricated girder;
paving a flow guide pipe according to the shape and the gradient of the blade mould, and setting glue injection ports on the flow guide pipe section by section;
covering a ventilating and glue-impermeable one-way membrane on an air extraction opening of the blade mould, and covering the air extraction opening with a sealing rubber strip;
covering and sealing by using a vacuum film, and measuring the vacuum degree by connecting a vacuum meter;
injecting resin and curing.
2. The vacuum infusion method of the wind driven generator blade according to claim 1, wherein when the flow guide net is laid on the glass fiber cloth or the girder, the flow guide net is completely laid on the glass fiber cloth at the root of the blade mold from the front edge to the rear edge, the flow guide net is not laid on the glass fiber cloth with the number of layers being less than or equal to six at the middle part of the blade mold, and the flow guide net is not laid on the region with the gradient being less than or equal to 30 ° at the middle part of the blade mold; a flow guide net is laid in the area, located in the middle of the blade mould, with the gradient larger than 30 degrees; the lower side of the flow guide pipe is paved with a flow guide net, and the crossbeam is paved with a flow guide net.
3. The vacuum infusion method for wind turbine blades according to claim 2, wherein the width of the flow guide net on the lower side of the flow guide pipe is 20 cm.
4. The method of claim 1, wherein the flow guide tube is an omega tube.
5. The vacuum infusion method for the blade of the wind driven generator as claimed in claim 1, wherein the resin injected into the draft tube is injected into the glass fiber material through the flow guide net during the resin injection, and air is exhausted while the resin is injected.
6. The vacuum infusion method of the wind driven generator blade as claimed in claim 5, wherein during the infusion process, a flow guide net is laid at the edge of the core material seam and the girder to balance the flow rate of the upper glue solution and the lower glue solution, so that the flow rate of the glue solution is balanced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011585859.5A CN112848390A (en) | 2020-12-29 | 2020-12-29 | Vacuum infusion method for wind driven generator blade |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011585859.5A CN112848390A (en) | 2020-12-29 | 2020-12-29 | Vacuum infusion method for wind driven generator blade |
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| Publication Number | Publication Date |
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| CN112848390A true CN112848390A (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011585859.5A Pending CN112848390A (en) | 2020-12-29 | 2020-12-29 | Vacuum infusion method for wind driven generator blade |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113400670A (en) * | 2021-06-17 | 2021-09-17 | 无锡互盛智能科技有限公司 | Manufacturing method of wind power blade |
| CN113492542A (en) * | 2021-07-06 | 2021-10-12 | 上海电气风电集团股份有限公司 | Blade pouring process method and pouring system |
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|---|---|---|---|---|
| US4942013A (en) * | 1989-03-27 | 1990-07-17 | Mcdonnell Douglas Corporation | Vacuum resin impregnation process |
| CN102114710A (en) * | 2009-12-30 | 2011-07-06 | 洛阳双瑞风电叶片有限公司 | Method for preparing large-scale composite-material aerogenerator blade |
| CN103538266A (en) * | 2013-09-26 | 2014-01-29 | 黑龙江天华风电设备制造有限公司 | Vacuum infusion method of glass fiber reinforced plastics cabin cover |
| CN104175570A (en) * | 2014-08-08 | 2014-12-03 | 连云港中复连众复合材料集团有限公司 | Method for integrally preparing blade auxiliary beam and blade shell of megawatt wind turbine |
| CN104416919A (en) * | 2013-08-28 | 2015-03-18 | 上海艾郎风电科技发展有限公司 | Method for integrally forming master mold and girder of wind turbine blade |
| CN104943193A (en) * | 2015-06-06 | 2015-09-30 | 重庆通用工业(集团)有限责任公司 | Integral molding method of wind power blade |
| CN105383074A (en) * | 2015-12-01 | 2016-03-09 | 洛阳双瑞风电叶片有限公司 | Wind-power blade preparation method capable of controlling mass distribution |
-
2020
- 2020-12-29 CN CN202011585859.5A patent/CN112848390A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4942013A (en) * | 1989-03-27 | 1990-07-17 | Mcdonnell Douglas Corporation | Vacuum resin impregnation process |
| CN102114710A (en) * | 2009-12-30 | 2011-07-06 | 洛阳双瑞风电叶片有限公司 | Method for preparing large-scale composite-material aerogenerator blade |
| CN104416919A (en) * | 2013-08-28 | 2015-03-18 | 上海艾郎风电科技发展有限公司 | Method for integrally forming master mold and girder of wind turbine blade |
| CN103538266A (en) * | 2013-09-26 | 2014-01-29 | 黑龙江天华风电设备制造有限公司 | Vacuum infusion method of glass fiber reinforced plastics cabin cover |
| CN104175570A (en) * | 2014-08-08 | 2014-12-03 | 连云港中复连众复合材料集团有限公司 | Method for integrally preparing blade auxiliary beam and blade shell of megawatt wind turbine |
| CN104943193A (en) * | 2015-06-06 | 2015-09-30 | 重庆通用工业(集团)有限责任公司 | Integral molding method of wind power blade |
| CN105383074A (en) * | 2015-12-01 | 2016-03-09 | 洛阳双瑞风电叶片有限公司 | Wind-power blade preparation method capable of controlling mass distribution |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113400670A (en) * | 2021-06-17 | 2021-09-17 | 无锡互盛智能科技有限公司 | Manufacturing method of wind power blade |
| CN113492542A (en) * | 2021-07-06 | 2021-10-12 | 上海电气风电集团股份有限公司 | Blade pouring process method and pouring system |
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Application publication date: 20210528 |